No way to save a table

I have the same problem.

What is interesting that I have this plugin on my other website (the same theme as the one I have this problem on) and plugin works fine.

Have a same problems in my new clean project!
I find problem! In my Database wpsm_table table not creating when I install this plugin. I active/deactivating but table was not found in DB.

I login in PhpMyAdmin and custom make this below SQL code changes $this->table_name to prefix_wpsm_tables but have error with name rows

$sql = ”
CREATE TABLE $this->table_name (
id MEDIUMINT(9) NOT NULL AUTO_INCREMENT,
name TINYTEXT NOT NULL,
rows MEDIUMINT(9) NOT NULL,
cols MEDIUMINT(9) NOT NULL,
subs TINYTEXT NOT NULL,
color TINYTEXT NOT NULL,
responsive tinyint(1) NOT NULL DEFAULT ‘0’,
tvalues LONGTEXT NOT NULL,
UNIQUE KEY id (id)
);
“;

Then I understand that problem in this code rows MEDIUMINT(9) NOT NULL, I change to rows1 MEDIUMINT(9) NOT NULL, and table creating well!

Next I rename in PhpMyAdmin rows1 to original name rows and then plugin Table maker work perfect!

Hi Berdych! I don,t really understand the answer. What is Maria DB and how do we stop using it?

Thanks!